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DOI	10.5194/acp-19-3207-2019
	Long-term lidar observations of the gravity wave activity near the mesopause at Arecibo
	Yue X.; Friedman J.S.; Zhou Q.; Wu X.; Lautenbach J.
发表日期	2019
ISSN	16807316
起始页码	3207
结束页码	3221
卷号	19 期号:5
英文摘要	Using 11-year-long K Doppler lidar observations of temperature profiles in the mesosphere and lower thermosphere (MLT) between 85 and 100km, conducted at the Arecibo Observatory, Puerto Rico (18.35N, 66.75W), seasonal variations of mean temperature, the squared Brunt-Väisälä frequency, N2, and the gravity wave potential energy (GWPE) are estimated in a composite year. The following unique features are obtained. (1) The mean temperature structure shows similar characteristics to an earlier report based on a smaller dataset. (2) Temperature inversion layers (TILs) occur at 94-96 km in spring, at ∼ 92 km in summer, and at ∼ 91 km in early autumn. (3) The first complete range-resolved climatology of GWPE derived from temperature data in the tropical MLT exhibits an altitude-dependent combination of annual oscillation (AO) and semiannual oscillation (SAO). The maximum occurs in spring and the minimum in summer, and a second maximum is in autumn and a second minimum in winter. (4) The GWPE per unit volume reduces below ∼ 97 km altitude in all seasons. The reduction of GWPE is significant at and below the TILs but becomes faint above; this provides strong support for the mechanism that the formation of upper mesospheric TILs is mainly due to the reduction of GWPE. The climatology of GWPE shows an indeed pronounced altitudinal and temporal correlation with the wind field in the tropical mesopause region published in the literature. This suggests the GW activity in the tropical mesopause region should be manifested mainly by the filtering effect of the critical level of the local background wind and the energy conversion due to local dynamical instability. © 2019 Author(s).
语种	英语
scopus关键词	Doppler lidar; gravity wave; mesopause; potential energy; seasonal variation; temperature profile; Arecibo; Puerto Rico
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144578
作者单位	School of Electronic Information, Wuhan University, Wuhan, 430072, China; Collaborative Innovation Center of Geospatial Technology, 129 Luoyu Road, Wuhan, 430072, China; Arecibo Observatory, University of Central Florida, Arecibo, Puerto Rico; Puerto Rico Photonics Institute, School of Science and Technology, Universidad Metropolitana, Cupey, Puerto Rico; Electrical and Computer Engineering Department, Miami University, Oxford, OH, United States
推荐引用方式 GB/T 7714	Yue X.,Friedman J.S.,Zhou Q.,et al. Long-term lidar observations of the gravity wave activity near the mesopause at Arecibo[J],2019,19(5).
APA	Yue X.,Friedman J.S.,Zhou Q.,Wu X.,&Lautenbach J..(2019).Long-term lidar observations of the gravity wave activity near the mesopause at Arecibo.Atmospheric Chemistry and Physics,19(5).
MLA	Yue X.,et al."Long-term lidar observations of the gravity wave activity near the mesopause at Arecibo".Atmospheric Chemistry and Physics 19.5(2019).